Assume the betas for securities A, B, C are as shown here: a. calculate the change in return for each security if the market experiences an increase in its rate of 12.9% over the next period. b. calculate the change in return for each security if the market experiences a decrease in its rate of return of 10.5% over the next period. c. rank and discuss the relative risk of each security on the basis of your findings. Which security might perform best during an economic downturn? Explain